The unprotected nature of the sites and the condition of the ruins prevented the preservation of fragile articles like baskets and fabrics, which frequently occur in caves, in one or two instances buried under the floors. There is little doubt that excavations in cemeteries of the open-sky ruins would reveal considerable material of this nature, which would probably duplicate that which has been produced from the adjacent cliff-houses. Many parts of wooden beams, mainly the remains of flooring and roofs, were seen still in the walls, but these as a rule were fragmentary. The ends of the timbers still adhering to the walls show that they were cut into shape by stone implements, aided by live embers. They appear to have been split by means of wedges made of stone and often rubbed down smooth with polishing instruments of the same material. The majority of these wooden beams plainly show the action of fire, but no roof was intact. From the size of the logs shown in fragments of beams, it is evident that the roof supports had been brought there from some distance; trees of the magnitude they imply do not now grow in the neighborhood of some of the ruins where these beams occur. HISTORIC REMAINS The various objects found in the ruins or on the surface of the ground as a rule are characteristic of a people in the stone-age culture, ignorant of metals, and therefore prehistoric, but here and there on the surface have been picked up iron weapons which belonged to the historic period. The old “Spanish Trail” mentioned in preceding pages was the early highway from Santa Fe, New Mexico, to the Great Salt Lake, and followed approximately an old Indian trail that was probably used by the prehistoric inhabitants or the builders of the towers. Not far from the head of Yellow Jacket Canyon a ranchman discovered on his farm a few years ago the blades of two Spanish iron lance heads or knives, still well preserved, the hilts, however, being destroyed. These objects, now in Mr. Williamson’s collection at Dolores, may have belonged to a party of Spanish soldiers who explored this region, but their form, in addition to the material, is so characteristic that no one would assign them to aboriginal manufacture. Fragments of a stirrup of metal, parts of the harness or saddle, also belonging to the Spanish epoch, have also been found. The indications are that these objects are historic, but their owners may have been Indians who obtained them from Europeans. They probably do not antedate the middle of the eighteenth century, when two Catholic fathers, with an escort of soldiers, made their trip of discovery from Santa Fe into what is now Utah. They shed no light on the epoch of the aborigines who constructed the castles and towers considered in this paper. CONCLUSIONS